Interesting links, though the op has unfortunately and unintentionally mixed them up a bit.
Brooke Magnanti is an ex- sex-worker turned academic (scientist) who is largely pro-escorts (and with responsible data to back up her case) but who can perhaps overstate her case when it comes to pornography and feminism (subjects about which she appears to know considerably less). She's not a social scientist or sociologist so has no academic background to support her analysis of the sex industry but writes about it as an intelligent and educated woman.
Tanya Gold looks like a fat blob of a woman, an ex-alcoholic, who nevertheless can write eye-catching articles. Her podiums include being anti-prostitutes and anti-academics.
Catherine Hakim, who reviews Magnati's book (mostly positively) in the link from the newspaper article, is a prominent sociologist who looks like she knows what she's talking about.
Johnny Rotten is an ex-member of 70s punk band the Sex Pistols. I have no excuse for introducing his name on this thread.